A factory produces electric bulbs. If 1 out of every 10 bulbs is defective and the factory produces 630 bulbs per day, what is the number of defective bulbs produced each day?

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620

answer is A.

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Detailed Solution

Given that a factory produces electric bulbs and 1 out of every 10 bulbs is defective and the factory produces 630 bulbs per day.
By using the unitary method,

Number of defective bulbs = Number of all bulbs 10 = 63010 = 63

Therefore, there are 63 defective bulbs present.
Hence option 2 is correct.

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